2 ripe avocados, halved, stoned, peeled and sliced
1-2 red chillies, seeds removed (for less heat if preferred), very finely diced
1 small bunch either coriander or basil, roughly chopped (about 2 tbsp each)
3cm/1录in piece fresh root ginger, peeled and finely chopped
2 limes, 1 quartered, 1 juiced
8 sticks rosemary, leaves removed from all but the top of each stalk
5 spring onions, finely sliced
2 large tomatoes, seeds removed, diced into 1cm/陆in pieces
flaked sea salt and freshly ground black pepper
1 tbsp olive oil
16 raw, peeled, jumbo prawns, deveined
2 slices prosciutto